method and apparatus for casting plate glass



mmh my 5925.-'

MEQ-wm w F. E. TRQUTMAN m @L METHOD AND APPARATUS FOR CAS'PNG PLATE GLASS Filed July 24. 192% 4molten glass .it known that, vWe FRANK E. Tlzom MAN and CHARLES lil. CH y eifel/:ens of the Unitoo ood 1 o itlor, in the county of Butler and Stolze of lleno Sylvania llave invented a nov" fond useful Improvement in Methods ood Apparatus 'for Costing ljloto Glas g ood tl'loy do liefeby doolm'o t-l'le oliow'vog to lne :t fulli oie-ar, and emot description"tleleo ur .invention :rfolotos to the manufacture of plate glass i y nesting and rolling, and it as special rotoence to tlie dieohsuge ot :from o tool( or other container and tho delivery oft the disolmrgod floss upon 'tho eristog table.

'5i/*lion molten ie delvozod to oasis ing table tlrou dowowodiy opening outlete it l1l :tooo been' o matterot oooeldeovolo tinto. ty to "moe the gloss to .issue from the out, t

will o @loam leading endj because it .lo

noo 'sarjg/ to Shot ott the flow of glass ol oooh oostiog operation and when itil-3 'flow' is again started elle :first portion of gilles which lfwe tlnoogigh the outlet likely sorry W it portions of glass Wlielii llave soldiieii mound the oui1- let, between the casting.; o solutions, end also carries with .it any veloy :fragments or other mpultios Wlxoll may havo been dislodged from the edges ol tlm out-let by the 'volvo ola plunger Wloli. hes 'leetofore been used to control the flow olf? It is the object of om' invention to improve the de livery of gloss to casting filiales 'by insuring tllt the. leading end o t issuing; gloss olla-ll bo clean7 lot- 'i ee from Strings of solidified glafss.. ",'o tl is end, We provide moons Wfo 'li operates Wl/lenovo? the flow of oil-ass through the outlet .is otoppod to chill the portion of immediately bolow the outlet., thus :forming e of solidied iiidioo the ,next elzwgo oif is to be poured we iomove tl 's plo;2J of solidified glass in o, single, piece which carries With it any etzings oi.' other irregulm masses that may have accumulated outlet, and leaves the outlet open fol' die die :barge of 'lil-esl?, lxo't glos v A slmpio and effective arrangement for' -ozyiow out invention into pi'ooiliee is Shown the accompanying drawing, in which Fig. ll ,is a vertical-seetloool vView ,'l. Serial No. 527722457 teken centmlly through tlm outlet of o oostiovontion7- and' of o portion o the ports shown in Fig". -97

the soot-ion being token ot tight angles to Fig. 3.

lfn the lmwiog'j the. mimerel indicates the outlet through which molten gloss tlowe from o took-furnace or other oontaiioemtliis opening boing ordiomily formed lo. tirocloy bushing' Surrounding; the opozoing' Si, and attached to the onder side of bushing 3, is a hollow ring through which 'water or other cooling fluid or mi" may lio circulated by means Whioli eo'not Shown in the drawing, since suoli cooling meme tre well known, in this Remato tlio flog f5; is secured a paix ol" pmollel guidovmyo 5' in which is slidaloly mounted o. lmilie 6 which; like tho ring 4C, hollow and is provided with means for cooling. lThe knife, 6, os shown, is connected to ono ond ol the piston rod 7 foi pressure cylinder 8 provided with any ordinary connections, not sl'lovmy for supplying pressure to reciprocate the pio ton rod Tand the knife 6. The parts tliue for described are similar to those shown in om: coponding' applioetion for Lettoizi Pot ont, Serial No..v525,327, filed December E28, 1921.

When the knife@ is in the position shown in, Fig. l, a, oolomn ot glofvindiooted by the unmet-ol 9, Howe through the outlet, and may be received, upon, Lioeted diagrammetoelly et 10e.. l/Vllen sufficient quantity of gloss hoo ited on thotable ML the liow of gloss is out oli by moving the imite 6 oorosi the open ing intotho position shown. in Fig. 2.A l- Will be observed that the limer edge of the ring' 4 'flares downwoidly and outwardly, as,

a (meting table lown been lll() wa-ter-cogled knife 6. The glass in the -space- 12l therefore begins to chill rapdly without, however, adhering to the ring 4 or theknife 6, and this chilling action soon 5 produces, immediately above the knife 6, a lilyer of 'solidiiied glass which is strong enough to hold up the weight of molten glass immediately above the outlet.. When the chilling has roceeded thus far the knife 6 is again with rawii to the position shown in Fig. 1.. No glass'ilows through the outlet at this time because of the lateral pressure exerted through the 'still molten interior of the s ace 12, .which pressure has orcedthe solidifying glass adjacent to the ring 4 to cling to the chilled ring, without, however, producing surface adhesion between the glass and the ring.

We then bring beneath the outlet 2 the device shown in Fig. 3which consists of a iiat metal late carrying. a conical spearhead 16 w ich is raised somewhat above the plate 15 by a shank 17. The plate 15 rest-s loosely upon a hollow support 18 which is secured to the upper end of the vertical piston rod 19 of a lud-prcssure cylinder 20 that is carried by arms 21 which.A extend from a sleeve Z2 pivoted upon a pin 23 which is carried in a bracket 24. The cylinder may be otherwise supported, the only requirement being that it shall he able to swing beneath theo'lass outlet 2 and later to swing away from lille glass outlet to pei'- mit the glass to descend upon the casting table.

The spear-head device 4shown in Fig. 3 is placed .upon the support 18 and, as stated abo-ve, is swung beneath .the glass outlet 2. The cylinder() is then operated to raise the plate 15, thus causing the spear-head 16 to pierce thea/plug of Asolidified or partially solidified glass, the interior of which, at this time, is still somewhat plastic,'or may even' be entirely luid This upwardmovement 4 of the spear-head continues.l untilithe plate 15 rests flat against the under side of the ring 4. In order to permit this movement the sides of the plate 15 vadjacent to the knife guideways 5 are bent downwardly as l shown at 25, Fig. 4.

' The cylinder 2O is then operated to lower the piston rod 19, thereby vwithdrawing Vthe support 18 and leavin the plate 15 held up by thespearhead 1 which. is' embedded in the glass; The cylinder 20 -ie-thexil swung to one sideg'as shown in 'dotted lines, Fig. 3. Whenthe nextcasting operation is to he startedftheplate 15 is' pulled down by any suiienifeil means, carrying withft all "of the 30 bglassfivvhich has been solidified through-the' 1 -p'yeh-illing" action of the knife 6 and the ring;

ldidier the. purpose et thus withdrawing the spear;head. device, we have shown n Figs. and s' 'a4 Vloop 26 project-ing below 0 the plate 15 in-position to be vengaged with a hook, lever or other suitable tool. The engagement between the glass plug and the walls of the outlet it, while sulicient to pre vent the flow of glass before the plug is withdrawn, is not sulticiently tight. torerployed for controlling the flow of glass no plunger o-r other form of valve is required within the tank, and the feeding arrangements are therefore greatly sii'npliied as compared with other devices which have been used for this purpose.

It will be understood that the expression plate glass, as used herein, is not restricted to glass plates that are ground and polished, but includes any form of iiat glass, whether polished or not, as distinguished from hollow glassware.

'While the apparatus described above is well suited for carrying out ourinvention, it will also be understood that various changes may be made within the scope of our invention as indicated in the appended claims.

We claim as our invention: 1.' Apparatus for casting plate or rolled glass comprising a glass-receptacle having a downwardly opening outlet, a fluid-cooled ring disposed immediately beneath v'and around said outlet, a hollow fluid-cooled knife mounted for reciprocation beneath said' outlet, and means for withdrawing solidified glass formed in said outlet by the lchilling action of said ring and said knife.

2. Apparatus for casting plate or rolled glass comprising a glass-receptacle having a. downwardly 'opening outlet, e for closing said outlet and for sol in* a portion of the 'glass adgacent to said outlet,

and means 'for withdrawing said solidified glass from said outlet comprising a member adapted to penetrate said solidified glass,

means for introducing said member into said outlet, :and means vfor withdrawing said member froml said outlet. f

tien of the glass adjacent tofsai'd outlet, andmeans 'for withdrawing said solidii'ied glass.

from said outlet comprising a pointed member adapted to penetrate saidsolidiiied glass and having a et reduced diameter beasedeee low its upper pointed end, means `for in troducing said member into said outlet, and means for withdrawing said member from said utlet.

Lle, l pparatus for casting plate or rolled glass comprising a glass receptacle having a downwardly opening outlet, means tor closingsaid outlet and for solidit'ying a portion of the glass adjacent to said outlet, and means for withdrawing said solidified glass Ifrom said. outlet comprising a plate adapted to cover said outlet from beneath, a pointed member carried by said plate and having a `shank of reduced diameter below its pointed upper end, means for raising said plate. beneath said outlet to cause'said pointed member to enter said outlet, and means for withdrawing said plate from beneath said outlet. 5. lipparatus for casting plate or rolled `glass con'lprieing aglass receptacle having a. downwardly opening outlet, means for elosing said outlet and for solidifying a portion of the glass vadjacent to said outlet, and means for withdrawing Said solidified glass from said outlet comprising a plate adapted 'to cover said outlet 'from beneath, a pointed member carried by said plate and having a shank of reduced diameter below its pointed upper end', a Huid-pressure cylinder adapted to be swung beneath said outletq and means carried by the piston rod ot said cylinderfor supporting said plate.

(i. Apparatus for casting plate or rolled` `lass comprising a/ glass receptacle having a downwardly openingr outlet, means for closing said. outlet and :tor solidifying a por- .tion ot the glass adjacent to said outlet, and means tor withdmwingsaid solidified lalass from said outlet comprising a plate adaptcd to cover said outlet from beneath, apointed member carried by Sayid plate and having` a shank of reduced diameter below itsI pointed upper end, ay liuid-pressure cylindcr adapted to be swung beneath said out let, means carried by the. piston rod ot said cylinder tor supporting said plate, and a. member carried by said plate whereby said plate may be withdrawn from said outlet.

'7 The method ot castingr plate or rolled fthat comprises'permitting glass to flow through a downwardly opening' outlet, inter-.-

luptiun` the How ot glass through said outlot. chillingr a portion ol the glass adjacent to said outlet. and removing and discarding the plug' of chilled glass thus formed, thereby opening Isaid out-let for the discharge of another portion of glass.

S. 'lhe method of casting plate or rolled glass that comprises placing the glass in a receptacle having` ay downwardly opening outlet, chilling a. portion ot the glass adjacent to said out-let', thrusting into said outlet a member havingv a head adapted to engage and withdraw said solidified dass and withdrawingsaid member from said outlet,

`,the glass thereabove,

thereby reiuovii'ir,f said solidilied glassand permitting fresh glass to tiow thro-ugh said outlet.

S). 'llhe method of castingplatefor rolled glass that comprises placing the glass in a receptacle having a downwardly openingoutlet, permittingr glass to'fiow through said outlet, interi-routing the flow of glass by means ot' a fluid-cooled closure' member, chilling a, portion of the glass adjacent to said outlet, withdrawing said closure member, thrusting into said outlet a member having a head adapted to pierce said solidiass, and adapted to then become einbedded in the glass, and then withdrawing said member, thereby fied glass and permitting a. fresh portion-ot glass to {low through said io'iutlct.

removing said solidif- 10. The method of casting plate or rolled glass that comprises 'placing the glass in a receptacle having,r a` downwardly opening outlet, surrounding a` portion of the glass adjacent to said outlet with a cooling surplate of), rolled glass, removingj iup; into said outlet a member having ahead adapted to pierce said solidified gla.ss,vand ada]` ted to then become embcddcdvin the glass, and then withdrawingr said member, 'thereby ren'ioving` said solidified glass and permitting' a fresh portion of glass toI flow through said outlet.

.12. The method of cast-nig" plate or rolled glass that comprises permitting glass to :lio-w through a downwardly opening outlet, interrupting' the flow of glass through said outlet, chillin g, the bottom surface of the glass within said outlet to form a holding plug` for the glass Vthereabove, and removing said plugf'oi chilled glass to thereby open said outlet tor the discharge ot another port-ion otl glass. j

lll. The method of casting plate or rolled glass tlut comprises pern'iit-tiingg` glass to flow through a downwardly opening outlet, inten rupting the dow ot glass through said outlet, chilling' the bottom surface of the glass within said outlet. to form a holdingA plug for and removing said plugof chilled glass to thereby open said outlet for the discharge of another portion of said plukt!l of glass, the middle portion being chilled to a lesser degree than the outer ion um'icms thereof, to peiinit insertion of :i withdrawing hooi through said relatively sofi, portion.

vM. Apparaus for casting plate or rolled comprising :L receptacle for the glass having a downwardly opening A. outl'et, mea-11s for dosing sai outletand for dulling porio-n of the gass adjacent thereto to form 2L balding piig for the glass there ibm-e, and iii-isms 'for removing the' said- 10 chilled portion.

In fesbiii'iony Wheieoi we, the said FRANK E. TRODTMAN unil CHARLES H. CHMSTIE, have herei'mtosui; (mr hands.

FRANK E. TROUTMAN. CHARLES H. GHRSTIE. 

